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One BTU is the energy required to heat 1 avoirdupois pound of liquid water by 1 degree Fahrenheit, at a pressure of one atmosphere. The Btu (mean) uses a result averaged over water temperatures 0 to 100 °C (32.0 to 212.0 °F) which is approx. 1055.87 J
The 5th International Conference on the Properties of Steam defined the International Table calorie as 4.1868 J. One Calorie (Kilogram,IT) is 1,000 times this value - 4,186.8 J
| Btu (mean) | Calories (Kilogram,I.T.) |
|---|---|
| 0Btu (mean) | 0.00calIT |
| 1Btu (mean) | 0.25calIT |
| 2Btu (mean) | 0.50calIT |
| 3Btu (mean) | 0.76calIT |
| 4Btu (mean) | 1.01calIT |
| 5Btu (mean) | 1.26calIT |
| 6Btu (mean) | 1.51calIT |
| 7Btu (mean) | 1.77calIT |
| 8Btu (mean) | 2.02calIT |
| 9Btu (mean) | 2.27calIT |
| 10Btu (mean) | 2.52calIT |
| 11Btu (mean) | 2.77calIT |
| 12Btu (mean) | 3.03calIT |
| 13Btu (mean) | 3.28calIT |
| 14Btu (mean) | 3.53calIT |
| 15Btu (mean) | 3.78calIT |
| 16Btu (mean) | 4.04calIT |
| 17Btu (mean) | 4.29calIT |
| 18Btu (mean) | 4.54calIT |
| 19Btu (mean) | 4.79calIT |
| Btu (mean) | Calories (Kilogram,I.T.) |
|---|---|
| 20Btu (mean) | 5.04calIT |
| 21Btu (mean) | 5.30calIT |
| 22Btu (mean) | 5.55calIT |
| 23Btu (mean) | 5.80calIT |
| 24Btu (mean) | 6.05calIT |
| 25Btu (mean) | 6.30calIT |
| 26Btu (mean) | 6.56calIT |
| 27Btu (mean) | 6.81calIT |
| 28Btu (mean) | 7.06calIT |
| 29Btu (mean) | 7.31calIT |
| 30Btu (mean) | 7.57calIT |
| 31Btu (mean) | 7.82calIT |
| 32Btu (mean) | 8.07calIT |
| 33Btu (mean) | 8.32calIT |
| 34Btu (mean) | 8.57calIT |
| 35Btu (mean) | 8.83calIT |
| 36Btu (mean) | 9.08calIT |
| 37Btu (mean) | 9.33calIT |
| 38Btu (mean) | 9.58calIT |
| 39Btu (mean) | 9.84calIT |
| Btu (mean) | Calories (Kilogram,I.T.) |
|---|---|
| 40Btu (mean) | 10.09calIT |
| 41Btu (mean) | 10.34calIT |
| 42Btu (mean) | 10.59calIT |
| 43Btu (mean) | 10.84calIT |
| 44Btu (mean) | 11.10calIT |
| 45Btu (mean) | 11.35calIT |
| 46Btu (mean) | 11.60calIT |
| 47Btu (mean) | 11.85calIT |
| 48Btu (mean) | 12.11calIT |
| 49Btu (mean) | 12.36calIT |
| 50Btu (mean) | 12.61calIT |
| 51Btu (mean) | 12.86calIT |
| 52Btu (mean) | 13.11calIT |
| 53Btu (mean) | 13.37calIT |
| 54Btu (mean) | 13.62calIT |
| 55Btu (mean) | 13.87calIT |
| 56Btu (mean) | 14.12calIT |
| 57Btu (mean) | 14.37calIT |
| 58Btu (mean) | 14.63calIT |
| 59Btu (mean) | 14.88calIT |